2024-03-29T14:04:30Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/49392021-11-10T09:38:18Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845
Martínez Alonso, Marta
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Cerdá, Jesús .
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500
Momblona, Cristina .
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500
Pertegás, Antonio .
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500
Junquera Hernández, José M. .
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500
Heras, Aránzazu
273
500
Rodríguez, Ana M. .
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500
Espino Ordóñez, Gustavo
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Bolink, Henk .
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Ortí, Enrique .
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500
2018-09-12T11:40:07Z
2018-09-12T11:40:07Z
2017-09
0020-1669
http://hdl.handle.net/10259/4939
10.1021/acs.inorgchem.7b01167
A series of bis-cyclometalated iridium(III)
complexes of general formula [Ir(ppy)2(N∧N)][PF6] (ppy−
= 2-phenylpyridinate; N∧N = 2-(1H-imidazol-2-yl)pyridine
(1), 2-(2-pyridyl)benzimidazole (2), 1-methyl-2-pyridin-2-yl-
1H-benzimidazole (3), 2-(4′-thiazolyl)benzimidazole (4), 1-
methyl-2-(4′-thiazolyl)benzimidazole (5)) is reported, and
their use as electroluminescent materials in light-emitting
electrochemical cell (LEC) devices is investigated. [2][PF6]
and [3][PF6] are orange emitters with intense unstructured
emission around 590 nm in acetonitrile solution. [1][PF6],
[4][PF6], and [5][PF6] are green weak emitters with
structured emission bands peaking around 500 nm. The
different photophysical properties are due to the effect that the
chemical structure of the ancillary ligand has on the nature of the emitting triplet state. Whereas the benzimidazole unit stabilizes
the LUMO and gives rise to a 3MLCT/3LLCT emitting triplet in [2][PF6] and [3][PF6], the presence of the thiazolyl ring
produces the opposite effect in [4][PF6] and [5][PF6] and the emitting state has a predominant 3LC character. Complexes with
3MLCT/3LLCT emitting triplets give rise to LEC devices with luminance values 1 order higher than those of complexes with
3LC emitting states. Protecting the imidazole N−H bond with a methyl group, as in complexes [3][PF6] and [5][PF6], shows
that the emissive properties become more stable. [3][PF6] leads to outstanding LECs with simultaneously high luminance (904
cd m−2), efficiency (9.15 cd A−1), and stability (lifetime over 2500 h).
Spanish Ministry of Economy and
Competitiveness (MINECO) of Spain (projects CTQ2014-
58812-C2-1-R, MAT2014-55200, CTQ2014-55583-R,
CTQ2014-61914-EXP, CTQ2015-71955-REDT, CTQ2015-
70371-REDT, CTQ2015-71154-P, and Unidad de Excelencia
Marıá de Maeztu MDM-2015-0538), European Feder funds
(CTQ2015-71154-P), Obra Social “la Caixa” (OSLC-2012-
007), Junta de Castilla y León (BU033-U16), and Generalitat
Valenciana (Prometeo2016/135)
application/pdf
eng
American Chemical Society
Inorganic Chemistry. 2017, V. 56, n. 17, p. 10298–10310
https://doi.org/10.1021/acs.inorgchem.7b01167
info:eu-repo/grantAgreement/MINECO/CTQ2014-58812-C2-1-R
info:eu-repo/grantAgreement/MINECO/MAT2014-55200
info:eu-repo/grantAgreement/MINECO/CTQ2014-55583-R
info:eu-repo/grantAgreement/MINECO/CTQ2014-61914-EXP
info:eu-repo/grantAgreement/MINECO/CTQ2015-71955-REDT
info:eu-repo/grantAgreement/MINECO/CTQ2015-
70371-REDT
info:eu-repo/grantAgreement/MINECO/CTQ2015-71154-P
info:eu-repo/grantAgreement/MICINN/MDM-2015-0538
info:eu-repo/grantAgreement/FEDER/CTQ2015-71154-P
info:eu-repo/grantAgreement/FundaciónLaCaixa/OSLC-2012-007
info:eu-repo/grantAgreement/JCyL/BU033-U16
info:eu-repo/grantAgreement/GVA/Prometeo2016-135
Química analítica
Chemistry, Analytic
Highly stable and efficient light-emitting electrochemical cells based on cationic iridium complexes bearing arylazole ancillary ligands
info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
info:eu-repo/semantics/openAccess
THUMBNAIL
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InorgChem2017_.pdf
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InorgChem2017_.pdf.txt
InorgChem2017_.pdf.txt
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10259/4939
oai:riubu.ubu.es:10259/4939
2021-11-10 10:38:18.371
Repositorio Institucional de la Universidad de Burgos
bubrep@ubu.es
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